When we hear the words bipolar disorder, many of us immediately picture dramatic mood swings: someone feeling incredibly happy one moment and deeply depressed the next.
But bipolar disorder is much more complex than simply being “up and down”.
It is a mental health condition that can affect a person's mood, energy, thoughts, sleep, behaviour, relationships and ability to function. For the person experiencing it, the changes can sometimes feel confusing, frightening, exhilarating or completely overwhelming.
And perhaps one of the most important things to understand is this:
A person is not their diagnosis.
Bipolar disorder may be part of someone's life, but it does not define their personality, their abilities, their relationships, their hopes or their future.
With the right treatment, support and understanding, many people with bipolar disorder are able to build fulfilling lives, maintain relationships, work, study and pursue the things that matter to them.
So, what exactly is bipolar disorder?
What is bipolar disorder?
Bipolar disorder is a mental health condition involving significant changes in mood, energy, activity and thinking.
People with bipolar disorder experience episodes of depression and episodes of mania or hypomania. These episodes are different from the ordinary emotional ups and downs that most of us experience.
Everyone has days when they feel energetic and positive and other days when they feel tired or low.
Bipolar disorder is different because the changes can be much more intense, last for longer periods and significantly affect the person's everyday functioning.
According to the World Health Organization, bipolar disorder affects millions of people worldwide and is associated with difficulties across areas such as relationships, work and daily functioning. Importantly, effective treatments are available.
It is also worth remembering that bipolar disorder does not look exactly the same in everyone.
One person's experience may be very different from another's.
The two sides of bipolar disorder
Although bipolar disorder is often described as having “highs and lows”, there is much more nuance to those terms.
The main mood episodes are:
- mania
- hypomania
- depression
Some people can also experience episodes containing symptoms of both elevated and depressed mood.
Let's look at each one.
Mania: when the mind and body seem to accelerate
Mania is much more than simply feeling happy.
During a manic episode, a person may experience an unusually elevated, expansive or irritable mood accompanied by a significant increase in energy and activity.
They may feel as though their mind is moving incredibly quickly.
They might sleep very little but not feel tired.
They may talk much more than usual, jump rapidly from one idea to another or feel as though they have an endless supply of ideas.
Some people experience a powerful sense of confidence or importance.
They may suddenly believe they can accomplish almost anything.
And while increased confidence can sound positive, mania can also significantly affect judgement.
A person might:
- spend large amounts of money
- make impulsive purchases
- take financial risks
- behave sexually in ways that are out of character
- drive dangerously
- start numerous projects without completing them
- make unrealistic plans
- become unusually argumentative or irritable
- become easily distracted
- speak rapidly
- sleep very little
- become increasingly restless or agitated
In more severe episodes, a person may experience psychotic symptoms, such as delusions or hallucinations.
This is one reason mania should never be dismissed as simply someone being “in a really good mood”.
It can become a serious mental health crisis.
NICE recommends urgent specialist assessment when mania is suspected, particularly when there is significant risk to the person or others.
Hypomania: the less obvious high
Hypomania can be particularly difficult to recognise.
It involves many of the same types of symptoms associated with mania—such as increased energy, reduced need for sleep, rapid thinking, increased confidence and increased activity—but the episode is less severe.
The person may still be able to function relatively well.
In fact, they may initially feel better than usual.
They might think:
“I've never felt this productive.”
They may suddenly become extremely creative, social, confident or motivated.
They might start exercising intensely, make ambitious plans, become highly talkative or work for hours without feeling tired.
And this can make hypomania complicated.
Why would someone necessarily want it to stop if they feel fantastic?
The problem is that what begins as increased energy and productivity can sometimes develop into behaviours that become disruptive or risky.
Hypomania is particularly important when considering bipolar II disorder, where a person experiences hypomanic episodes and major depressive episodes rather than the full manic episodes characteristic of bipolar I disorder.
Depression: the other side of the experience
For many people with bipolar disorder, depression can be extremely debilitating.
A depressive episode can involve much more than feeling sad.
Someone may experience:
- persistent sadness or emptiness
- loss of interest or pleasure
- profound tiredness
- difficulty concentrating
- feelings of worthlessness
- hopelessness
- changes in appetite
- changes in sleep
- slowed thinking or movement
- withdrawing from other people
- difficulty managing everyday responsibilities
- thoughts about death or suicide
Imagine having to carry out ordinary tasks while your mind and body are telling you that everything feels pointless and exhausting.
Getting out of bed can become an achievement.
Answering a message can feel overwhelming.
Going to work may require enormous effort.
And sometimes the person may not be able to explain why they feel this way.
This is why compassion matters.
Depression isn't laziness.
It isn't weakness.
And it certainly isn't someone simply “not trying hard enough”.
Bipolar I and Bipolar II: what's the difference?
You may have heard people talk about Bipolar I and Bipolar II.
The distinction is important.
Bipolar I
Bipolar I involves at least one manic episode.
The manic episode may be severe enough to cause significant disruption to someone's life or require hospital treatment. Depressive episodes commonly occur too, although they are not required for the diagnosis of Bipolar I.
Bipolar II
Bipolar II involves:
- episodes of hypomania
- episodes of major depression
There is no history of a full manic episode.
This doesn't mean Bipolar II is simply a “milder” version of bipolar disorder.
The depression associated with Bipolar II can be extremely severe and disabling.
Sometimes people with Bipolar II spend considerably more time experiencing depression than hypomania.
Cyclothymia: when mood changes are persistent but less extreme
Another condition within the bipolar spectrum is cyclothymic disorder, sometimes called cyclothymia.
People with cyclothymia experience recurring periods of hypomanic and depressive symptoms that don't meet the full criteria for hypomanic or depressive episodes.
The symptoms may nevertheless have a meaningful impact on someone's life.
It is important not to assume that because symptoms don't reach the threshold for full mania or major depression, they are therefore insignificant.
Mental health exists on a spectrum, and people's experiences deserve to be understood in their own context.
What causes bipolar disorder?
This is one of the questions people often ask:
“What caused this?”
Unfortunately, there isn't one simple answer.
Bipolar disorder appears to involve an interaction between biological, genetic and environmental factors.
There can be a genetic vulnerability, meaning that having close relatives with bipolar disorder may increase a person's likelihood of developing it.
However, genetics aren't destiny.
Having a family member with bipolar disorder does not mean someone will definitely develop it.
Environmental experiences and life circumstances may also interact with underlying vulnerability.
Stress, disrupted sleep, substance use and significant life changes can influence mood episodes in some people.
Researchers continue to investigate the biological and environmental factors involved in bipolar disorder.
Bipolar disorder and sleep: a relationship worth paying attention to
Sleep deserves particular attention.
Changes in sleep can be both a symptom and a trigger associated with mood episodes.
During mania or hypomania, someone may need dramatically less sleep without feeling tired.
During depression, they may sleep excessively—or struggle to sleep at all.
This is why developing a stable daily rhythm can be so valuable.
Regular:
- sleep
- meals
- exercise
- medication
- social activity
can help create structure and stability.
One psychological approach that specifically focuses on this relationship is Interpersonal and Social Rhythm Therapy (IPSRT), which helps people develop greater consistency in their daily routines and interpersonal lives.
The aim isn't to create a rigid life.
It is to create enough stability that changes in routine can be noticed before they become overwhelming.
Is bipolar disorder just “mood swings”?
This is an important misconception to challenge.
Ordinary mood changes happen to everyone.
You might be happy in the morning, frustrated at lunchtime and exhausted by the evening.
That isn't necessarily bipolar disorder.
Bipolar episodes involve much more substantial changes in mood, energy, activity and functioning.
The duration and severity of symptoms also matter.
This is why bipolar disorder should not be diagnosed simply because someone experiences emotional ups and downs.
A proper assessment considers the person's history over time, including previous episodes, changes in behaviour, sleep, energy, functioning, family history, substance use and other possible explanations.
NICE specifically recommends considering differential diagnoses, including schizophrenia-spectrum disorders, personality disorders, ADHD, substance misuse and physical conditions such as thyroid disorders.
Why bipolar disorder can sometimes be difficult to diagnose
Diagnosis isn't always straightforward.
Imagine someone who comes to their GP because they have been depressed.
They may describe:
“I can't sleep properly. I have no energy. I feel hopeless. I don't enjoy anything anymore.”
The clinician may understandably begin by considering depression.
But what if the person has also experienced periods when they:
- slept only a few hours
- felt unusually energetic
- talked constantly
- spent excessively
- felt exceptionally confident
- took unusual risks
- had racing thoughts
- became unusually irritable?
If those periods aren't explored, an important part of the person's history can be missed.
This is one reason clinicians need to look at the whole pattern across time, rather than focusing only on the person's current mood.
NICE recommends asking about previous periods of overactivity or disinhibited behaviour when someone presents with depression.
Bipolar disorder and psychosis
Some people with bipolar disorder experience psychotic symptoms, particularly during severe mood episodes.
These can include:
- hallucinations
- delusions
- severely disorganised thinking
- beliefs that are significantly disconnected from reality
Psychosis can be frightening for the person experiencing it and for those around them.
It is also one reason bipolar disorder can sometimes initially be confused with other psychiatric conditions.
The important point is that psychotic symptoms do not automatically mean someone has schizophrenia.
Psychosis can occur in several mental health conditions, including bipolar disorder, severe depression and schizophrenia-spectrum disorders.
A careful assessment of the timing and nature of symptoms is therefore essential.
Treatment: there is hope
Perhaps one of the most important messages we can offer someone with bipolar disorder is:
There is treatment, and recovery is possible.
Bipolar disorder is generally considered a long-term condition, but long-term treatment can help reduce symptoms, prevent or lessen future episodes and improve quality of life.
Treatment may include a combination of:
- medication
- psychological therapy
- psychoeducation
- lifestyle and routine changes
- family support
- relapse-prevention planning
- crisis planning
- social support
Treatment should be individualised.
There isn't a single treatment that works identically for everybody.
Medication and bipolar disorder
Medication can play an important role in managing bipolar disorder.
Depending on the person's circumstances, clinicians may use:
- mood stabilisers
- antipsychotic medication
- other medications for particular symptoms or episodes
Lithium is an important long-term treatment option for bipolar disorder and is recommended by NICE in appropriate circumstances. Because lithium requires careful monitoring, people taking it generally need regular blood tests and physical health monitoring.
Medication decisions should always be made with an appropriately qualified prescriber.
This is particularly important because abruptly stopping or changing psychiatric medication can sometimes cause problems.
If someone has concerns about side effects or feels their medication isn't working, the safest approach is to speak to their prescriber rather than stopping medication suddenly.
What about antidepressants?
This is an area that requires particular care.
Someone experiencing bipolar depression may understandably ask:
“Why can't I just take an antidepressant?”
The answer isn't straightforward.
For some people, antidepressants may form part of treatment, but bipolar disorder requires careful consideration because antidepressant treatment can sometimes contribute to a switch into mania or hypomania or contribute to mood instability.
For this reason, treatment should be guided by a clinician who understands bipolar disorder rather than being approached in the same way as straightforward unipolar depression.
NICE provides specific recommendations for managing bipolar depression and medication choices.
Psychological therapy: medication isn't the whole story
Medication may be important, but psychological support can also be incredibly valuable.
Therapy can help someone understand:
- their mood patterns
- early warning signs
- triggers
- thoughts and behaviours associated with mood episodes
- relationship difficulties
- stress
- sleep disruption
- medication concerns
- coping strategies
- relapse prevention
Approaches may include bipolar-specific psychological interventions, CBT, interpersonal therapy and behavioural couples therapy, depending on the person's needs and circumstances. NICE recommends psychological interventions as part of the management of bipolar depression.
Therapy isn't about telling someone:
“Think positively.”
It is about helping them understand their experience and develop tools that allow them to respond earlier and more effectively when difficulties begin to emerge.
Learning the early warning signs
One of the most empowering things a person with bipolar disorder can do is become familiar with their own early warning signs.
For one person, the first sign of hypomania might be:
“I'm suddenly sleeping four hours a night and don't feel tired.”
For another:
“I start making huge plans and feel like every idea is brilliant.”
Someone else might notice:
“I'm talking much faster than usual.”
Or:
“I've started spending money without thinking.”
Depression may have its own warning signs:
“I'm cancelling plans.”
“I'm staying in bed much longer.”
“I'm withdrawing from everyone.”
“I'm losing interest in things I normally enjoy.”
Recognising these changes early can allow someone and their support network to seek help before an episode becomes more severe.
A mood diary or mood chart can be useful for identifying patterns.
What can family and friends do?
Watching someone you love experience bipolar disorder can be incredibly difficult.
You may feel frightened when they become manic.
You may feel helpless when they become depressed.
And sometimes you may feel angry or exhausted after dealing with the consequences of impulsive behaviour.
These feelings don't make you a bad family member.
Supporting someone does not mean accepting everything they do without boundaries.
A healthy approach combines compassion with appropriate boundaries.
You might say:
“I can see that you're feeling very energised at the moment. I'm concerned because you've barely slept for several nights. Can we talk about getting some support?”
Rather than:
“You're acting crazy again.”
The first statement focuses on observable changes and concern.
The second can increase shame and defensiveness.
Family members can also learn the person's relapse plan, understand their early warning signs and know what to do if a crisis develops.
NICE recommends carer-focused education and support as part of bipolar care.
Boundaries matter too
Compassion doesn't mean becoming someone's full-time crisis manager.
If a person is spending excessively, behaving aggressively, driving dangerously or repeatedly crossing another person's boundaries, those behaviours still need to be addressed.
You can love someone and still say:
“I care about you, but I can't give you money for this.”
Or:
“I'm willing to talk to you when we're both calm, but I won't stay in a conversation where I'm being shouted at.”
Boundaries protect relationships.
They also protect carers from becoming completely overwhelmed.
The stigma surrounding bipolar disorder
Unfortunately, bipolar disorder is still surrounded by misconceptions.
People with bipolar disorder may be described as:
- unpredictable
- unstable
- dangerous
- attention-seeking
- unreliable
- “crazy”
These labels can be deeply damaging.
They reduce a complex human experience to a stereotype.
The reality is much more complicated.
A person can have bipolar disorder and also be:
- a loving parent
- a supportive friend
- a successful professional
- creative
- funny
- dependable
- intelligent
- compassionate
- ambitious
- resilient
A diagnosis tells us something about a person's mental health.
It doesn't tell us everything about the person.
Bipolar disorder and relationships
Relationships can sometimes become complicated when mood episodes affect communication, trust, finances, intimacy or behaviour.
During mania, someone may say things they later regret.
During depression, they may withdraw and appear emotionally unavailable.
Partners can sometimes struggle to understand whether they are seeing the person's usual personality or symptoms of an episode.
Open communication can help.
Couples may benefit from discussing:
- early warning signs
- treatment preferences
- financial boundaries
- sleep routines
- crisis plans
- communication strategies
- what support looks like
- when professional help should be sought
The aim isn't to make the relationship revolve around bipolar disorder.
It is to make sure the relationship has a plan for dealing with difficult periods.
Alcohol and drugs
Substances can complicate bipolar disorder considerably.
Alcohol and recreational drugs may affect sleep, mood, judgement and medication effectiveness. They can also make it harder to distinguish between symptoms of bipolar disorder and substance-related changes.
For someone vulnerable to mood episodes, protecting sleep and reducing substance use can therefore be an important part of staying well.
This isn't about judgement.
It's about understanding the relationship between substances, brain chemistry, sleep and mood.
What does recovery look like?
Recovery doesn't necessarily mean:
“I will never experience another difficult mood again.”
For someone with a long-term mental health condition, recovery may mean something different.
It might mean:
- understanding your condition
- recognising early warning signs
- finding treatment that works
- maintaining meaningful relationships
- returning to work or education
- developing routines
- learning how to manage stress
- knowing when to ask for help
- rebuilding confidence after an episode
- having a life that isn't organised entirely around illness
Recovery can be a process rather than a destination.
And setbacks don't mean that recovery has failed.
When should someone seek urgent help?
There are times when bipolar symptoms require urgent professional support.
This is particularly important when someone:
- is severely manic
- has become extremely agitated or confused
- is experiencing psychosis
- is behaving dangerously
- is unable to care for themselves
- has thoughts of suicide or self-harm
- presents a serious risk to themselves or others
NICE recommends urgent specialist assessment when mania or severe depression is suspected or when there is a significant risk of harm.
In the UK, if someone is in immediate danger or there is an emergency, call 999 or go to A&E. For urgent mental-health support that isn't an immediate emergency, NHS 111 can provide advice and direct people to appropriate services.
If someone is having suicidal thoughts, it is important to take them seriously and seek appropriate professional support rather than assuming the thoughts will simply pass.
And finally: look beyond the diagnosis
Perhaps the most important thing we can do when talking about bipolar disorder is to remember the person behind the symptoms.
A manic episode isn't the whole person.
A depressive episode isn't the whole person.
A diagnosis isn't the whole person.
Someone living with bipolar disorder may have experienced things that other people cannot see: lost relationships, financial difficulties, embarrassment about things they did during an episode, grief over opportunities missed, fear of relapse or exhaustion from constantly monitoring their mood.
They may also have discovered strengths they never knew they possessed.
Living with bipolar disorder can require considerable self-awareness, courage and resilience.
So instead of asking:
“What's wrong with this person?”
perhaps we can ask:
“What has this person been experiencing, and what might help them feel safe, understood and supported?”
That small change in perspective can make a very big difference.
Bipolar disorder is a serious mental health condition.
But serious does not mean hopeless.
With appropriate treatment, support, education and compassionate care, people can learn to understand their patterns, manage their symptoms and build meaningful lives.
And perhaps that is the message worth leaving people with:
A diagnosis can explain part of someone's experience. It should never be used to define the whole of who they are.
References and further reading
- National Institute for Health and Care Excellence (NICE). (2014, updated 2025). Bipolar disorder: assessment and management (CG185).
- National Health Service (NHS). Bipolar disorder. NHS mental health information.
- National Institute of Mental Health (NIMH). Bipolar Disorder. National Institutes of Health.
- World Health Organization (WHO). (2025/2026). Bipolar disorder / Mental disorders.
- NICE. Bipolar disorder: assessment and management – Assessment and diagnosis.
- National Institute of Mental Health (NIMH). Mental Health Medications – Mood Stabilizers.
This article is intended for educational purposes and is not a substitute for an individual assessment or medical advice. Anyone concerned about their own mental health or someone else's should seek advice from an appropriately qualified healthcare professional.